Nematodes of genus Rhabdochona Railliet, 1916 were collected from intestine of the catfish Rita rita and identified as new species Rhabdochona indusi. During current study on helminth parasites of Rita rita host, 125 nematodes (70 ♀ & 55 ♂) belong to the genus Rhabdochona were collected from 23 positive fishes out of 67 samples. Fishes were dissected and parasites were processed through the standard method and temporary slide were made. On the basis of differential diagnostic characteristics such as large striated body, greatest width in posterior region of male and anterior half of the female, 19 pairs of papillae, spicule size and shape, large spicule rounded anteriorly with small groove at lateral side and pointed posteriorly with curved ventrally without uniform thickness, smaller spicule rounded anteriorly and pointed posteriorly, shape of genital structures vulva marginal, anterior vulvar lip hook shape and posterior vulvar lip pointed, vagina muscular directed posteriorly and shape and size of eggs, such nematodes proposed as new species. The name of new species refers to the Indus River from where the host fishes were collected.

Kakar A, Bilqees FM. 2007c. Two new species of Rhabdochona Railliet, 1916 (Nematoda: Rhabdochonidae) from the fishes of Hingol River and Bolan River of Balochistan. Proceedings of Parasitology 44, 29-39.

Moravec F. 1972a. General characterization of the nematodes genus Rhabdochona with a revision of the South Australian species. Vest Cesk Spol Zoologica 36, 29-40.

Moravec F. 1975a. Reconstruction of the nematodes genus Rhabdochona Railliet, 1916 with a review of the species parasitic in fishes of Europe and Asia. (Studies of the CzeckSlovak Academic of sciences), No. 8 Publishing House Academia, Prague pp. 104.